﻿// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System.Collections.Generic;
using AvaloniaEdit.Text;
using AvaloniaEdit.Utils;

namespace AvaloniaEdit.Rendering
{
    internal sealed class TextViewCachedElements
    {
        private Dictionary<string, TextLine> _nonPrintableCharacterTexts;
        private TextFormatter _formatter;

        public TextLine GetTextForNonPrintableCharacter(string text, ITextRunConstructionContext context)
        {
            if (_nonPrintableCharacterTexts == null)
            {
                _nonPrintableCharacterTexts = new Dictionary<string, TextLine>();
            }

            if (_nonPrintableCharacterTexts.TryGetValue(text, out var textLine))
            {
                return textLine;
            }

            var properties = context.GlobalTextRunProperties.Clone();
            properties.ForegroundBrush = context.TextView.NonPrintableCharacterBrush;
            if (_formatter == null)
            {
                _formatter = TextFormatterFactory.Create();
            }

            textLine = FormattedTextElement.PrepareText(_formatter, text, properties);
            _nonPrintableCharacterTexts[text] = textLine;
            return textLine;
        }
    }
}
